基于MIKE 21模型的干支流交汇河段污染物扩散规律研究  

Study on Law of Pollutant Diffusion in Confluence of Branches and Tributaries based on MIKE21 Model

作　　者：李晓 王莹 Li Xiao;Wang Ying(Hydrology Bureau of Yellow River Water Conservancy Commission,Zhengzhou 450004,China)

机构地区：[1]黄河水利委员会水文局,郑州450004

出　　处：《黑龙江水利科技》2025年第3期1-4,共4页Heilongjiang Hydraulic Science and Technology

基　　金：国家重点研发计划课题(2022YFC3202301)。

摘　　要：为分析干支流交汇河段污染物扩散特征,文章基于MIKE 21模型建立了二维水动力水质数学模型,选择主要污染物氨氮为研究对象,研究了支流不同入汇条件对污染物扩散的影响。结果表明,在干流特定背景浓度情况下,支干流流量比Rq与污染物浓度比Rc满足Rq<2.205Rc-1.271时,可保证干流取水口水质为Ⅲ类水。文章的成果对于交汇河段的排污方案及水污染事故处理具有指导意义。In order to analyze the characteristics of pollutant diffusion in the reach where the branches and tributaries meet,a two-dimensional hydrodynamic and water quality mathematical model was established based on the MIKE 21 model,and ammonia nitrogen,the main pollutant,was selected as the research object to study the influence of different sink conditions of tributaries on pollutant diffusion.The results show that under the specific background concentration of the main stream,the flow ratio Rq and the pollutant concentration ratio Rc of the branch stream meet Rq<2.205Rc-1.271,the water quality of the main stream intake can be guaranteed to be classⅢwater.The results of this paper have guiding significance for the drainage scheme of the intersection reach and the treatment of water pollution accidents.

关 键 词：MIKE 21模型 交汇河段 污染物扩散 数值模拟 

分 类 号：X524[环境科学与工程—环境工程]